In the afternoon, a significant increase inthe height of thelava fountainswas observed (high estimateof40-60m).This is duecertainlyto the closure of the conemost in theSouth , theactivities is nowfocusing on a singlecone.

Seismic activity related to the fracturing of rocks in the volcanic edifice showed an increase in number of earthquakes and in their energy level compared to the previous week. This type of seismicity is mainly located in the northern sector of the volcanic structure, at 5.2 km from the Arenas crater, and to a lesser extent in areas South, Southwest and Southeast of the crater. The depths of seismic events were between 0.3 and 7.5 km. The occurrence of minor seismic increase, recorded on 08 and 09 September , which was located in the northern sector, at depths between 4.3 and 6.5 km is recorded. The maximum magnitude recorded during the week was 2.9 ML (local magnitude), which corresponds to two earthquakes recorded on 8 September, during the seismic increase at 2:29 and 3:08 (local time) at depths of 4.6 and 4.4 km, respectively.

The volcanic deformation measured from electronic inclinometers, global navigation satellite systems (GNSS) and satellite images to track changes in the tilt, the position and shape of the volcano, respectively, continued to record changes.

The volcano continues to emit into the atmosphere large amounts of water vapor and gases, including sulfur dioxide (SO2), as it was felt by the permanent stations SCANDOAS installed in the Volcano area and on satellite imagery. In monitoring the satellite images provided by the site Mirova, no thermal anomaly has been identified.The column of gas, steam and ash from time to time, reached a maximum height of 2000 m above the top of the volcano, on September 11. The direction of the dispersion of the column was in compliance with the prevailing wind in the area, which during the week showed a predominant direction towards the northwest of the volcano, promoting the dispersion of the ashes on the located populations in these directions with respect to the volcanic structure.

Source : SGC

Photos :Archives SGC

Sabancaya , Peru :

Significant recentactivityin recent weeks:

Three importantdevelopments have taken placein recentweeks:

1 / Temperature increaseat the level of the crater(5980m).TheMirovasystem(Universities of Turin and Florence)was detectedin July and August,anincrease in temperature which results inPRVvalueswhich have reached0.7megawatts,one of the largestrecorded valueof this volcano.

2 /The increasedintensity in2 areas of fumaroles , outside the crater on the flanks of the volcano.Satellite imagesdating fromAugust 2014and others sinceMay 2016showed the formationof two newareaswhere intensefumarolesontheNorthwestand NorthsidesSabancayaare issued. The first zone is located on the northwest side and extends to the vicinity of the crater up to 5700 meters, while the second area is located on the north side of the volcano, about an altitude of 5600 m. These two fumarolics areas follow a north-south orientation.

Popocatepetl , Mexico :

September 15 11:00 h (September 15 16:00 GMT)

In the last 24 hours the seismic records of the surveillance system at Popocatépetl volcano registered 307 low-intensity exhalations, with emissions of gas, steam and ash, three explosions, one yesterday at 14:08 h , and two today at 03:04 and 05:16 h , 144 minutes of harmonic tremor and three volcanotectonic event yesterday at 14:49, 14:57 y 15:11 h, with magnitude Mc 1.9, 2.6 y 1.7 respectively.

The cloudy conditions not allow observing the volcano continuously, but we observed an emission of steam and gas that the winds carried to the northwest . Along some lapses of the night was observed incandescence, increasing with main exhalations .

From dawn and up to the time of this report the cloudy condition allow to observe the crater and we observed that the wind carry the emission to the northwest .

CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments .
This type of activity is included within the scenarios Volcanic Traffic Light Yellow Phase 2.